import java.util.Scanner;

public class DAY0515 {
    public static void main1(String[] args) {
        Scanner s = new Scanner(System.in);
        while (s.hasNext()){
            int a = s.nextInt();
            int b = s.nextInt();

            if (a < b){
                int t =a ;
                a = b ;
                b = t ;
            }
            for (int i = a; i > 0 ; i++) {
                if (i%a == 0 && i%b == 0){
                    System.out.println(i);
                    break;//跳出循环
                }
            }
        }
    }


    public static void main2(String[] args) {
        //先接收
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()){
            int i = sc.nextInt();
            String[] nums = new String[i];
            for (int j = 0; j < i; j++) {
                nums[j] = sc.next();
            }
            //调用判断方法
            System.out.println(Determine(nums));
        }
    }
    //判断是哪种情况
    private static String Determine(String[] nums){
        //判断是否是按字符集来排序的
        boolean Is_character = Is_character(nums);
        //判断是否是按长度来排序的
        boolean Is_length = Is_length(nums);



        //两个都符合  both
        if (Is_character && Is_length){
            return "both";
        }
        //是字符集不是长度   lexicographically
        if(Is_character){
            return "lexicographically";
        }
        //是长度不是字符集  lengths
        if (Is_length){
            return "lengths";
        }
        //两个都不符合 none
        return "none";
    }
    //判断是否是按字符集来排序的
    private static boolean Is_character(String[] nums){
        boolean r = true;
        for (int i = 1; i < nums.length; i++) {
            if (nums[i].compareTo(nums[i-1])<=0){
                r = false;
                break;//结束循环
            }
        }
        return r;
    }
    //判断是否是按长度来排序的
    private static boolean Is_length(String[] nums){
        boolean r = true ;
        for (int i = 1; i < nums.length ; i++) {
            if (nums[i].length()<=nums[i-1].length()){
                r = false;
                break;//结束循环
            }
        }
        return r;
    }

    public static void main(String[] args) {
        double x =3.0;
        int y=5;
        x/=--y;
        System.out.println(x);
    }
}
